18197991

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{661}}^1$

素因数の和:716

約数の個数: 48

約数和(自身を含む): 33047040

約数和(自身を除く): 14849049

約数列:

[1, 3, 7, 9, 19, 21, 23, 57, 63, 69, 133, 161, 171, 207, 399, 437, 483, 661, 1197, 1311, 1449, 1983, 3059, 3933, 4627, 5949, 9177, 12559, 13881, 15203, 27531, 37677, 41643, 45609, 87913, 106421, 113031, 136827, 263739, 288857, 319263, 791217, 866571, 957789, 2021999, 2599713, 6065997, 18197991]

約数ペア:

[(1, 18197991), (3, 6065997), (7, 2599713), (9, 2021999), (19, 957789), (21, 866571), (23, 791217), (57, 319263), (63, 288857), (69, 263739), (133, 136827), (161, 113031), (171, 106421), (207, 87913), (399, 45609), (437, 41643), (483, 37677), (661, 27531), (1197, 15203), (1311, 13881), (1449, 12559), (1983, 9177), (3059, 5949), (3933, 4627)]